So I have a Ford 331 stroker full roller set up, and the local Ford guru at the dyno and engine shop said to use this Honda Pro GN4 engine oil. It's a 10W40 but it says 4 stroke motorcycle oil on the bottle. Has anyone heard of this oil before or had any experience with it? He claims this is the best oil you can get right now especially for a high rpm small block. He also advises against synthetic oil. Says use conventional and just change often?